from machine import Pin, ADC
from utime import sleep
from machine import Pin   

xAxis = ADC(Pin(27))
button = Pin(28,Pin.IN, Pin.PULL_UP)

#Left
led_1 = Pin(22, Pin.OUT)
led_5 = Pin(18, Pin.OUT)
led_8 = Pin(17, Pin.OUT)
led_ast = Pin(16, Pin.OUT)

#Right
led_A = Pin(26, Pin.OUT)
led_6 = Pin(19, Pin.OUT)
led_9 = Pin(20, Pin.OUT)
led_D = Pin(21, Pin.OUT)


Key_Down = const(1)

keys = [['1', '2', '3', 'A'],
        ['4', '5', '6', 'B'],
        ['7', '8', '9', 'C'],
        ['*', '0', '#', 'D']]

columns = [9, 8, 7, 6]
rows = [13, 12, 11, 10]

row_pins = [Pin(pin_name, mode=Pin.OUT) for pin_name in rows]
column_pins = [Pin(pin_name, mode=Pin.IN, pull=Pin.PULL_DOWN) for pin_name in columns]

def scan(row, column):
    row_pins[row].value(1)
    key = None
    if column_pins[column].value() == Key_Down:
        key = keys[row][column]
    row_pins[row].value(0)
    return key

def scan_keypad():
    for row in range(4):
        for col in range(4):
            key = scan(row, col)
            if key:
                return key
    return None

def toggle_led(led_pin):
    led_pin.value(not led_pin.value())

while True:

    xValue = xAxis.read_u16()
    xStatus = "middle"

    pressed_key = scan_keypad()

    if pressed_key:
        if pressed_key == '1':
            toggle_led(led_1)
        elif pressed_key == 'A':
            toggle_led(led_A)
        elif pressed_key == '5':
            toggle_led(led_5)
        elif pressed_key == '6':
            toggle_led(led_6)
        elif pressed_key == '8':
            toggle_led(led_8)
        elif pressed_key == '9':
            toggle_led(led_9)
        elif pressed_key == 'D':
            toggle_led(led_D)
        elif pressed_key == '*':
            toggle_led(led_ast)
    
    print("X: " + str(xValue))